Have it tested at any Auto Parts store. It can be tested on the car.
No car has a "cadillac" converter
It is integrated into the alternator, if it is bad you will need to replace the alternator.
The battery is bad or the alternator is not putting out the correct voltage and is bad.
The bearings might be bad in the alternator.
could be the alternator going bad or battery.
Turn car on remove positive battery terminal if car turns off alternator is bad
Signs that your alternator is going bad will include but not be limited to: Electronics such as Stereo, CB, Etc turn off. Gauges such as Speedometer and Tach read in accurately or stop functioning. Motor won't start.
When your battery does not get charge.
Voltage regulator built into the Altinator is bad. Replace voltage reg or whole altinator
Typically you know your alternator is out when you have to jump start your car numerous times. A way you can test it is by turning on your car and while it's running discount the + terminal. If the car turns off then your alternator is bad. If the car remains in then alternator is good and possible bad battery. Hope this helps
If it is makeing a noise or is not putting out at least 13.5 volts it is bad. Take the car or the alternator to an Auto Parts store and have them load test the alternator to be sure.
Your battery is bad, your alternator is bad or you have a wiring problem.